Sales tax to increase in Midland on Jan. 1 FacebookTwitterEmail The sales tax across Midland County will increase on Friday, according to the Midland Chamber of Commerce. The sales tax is set to increase Jan. 1 because of the increase voters approved for the Midland County Hospital District. The quarter-cent increase will raise the rate inside the city to 8.25 percent. The rate outside the city but inside the county, according to the chamber, is 7 percent. Businesses should make these changes to be in effect beginning Friday, according to the Texas Comptroller of Public Accounts. The amount of the sales tax increase is one-quarter of 1 percent, or what amounts to a quarter for every $100 spent on eligible goods. The quarter-cent of sales tax could potentially raise as much as $30 million for the hospital district to use for community health care services funding, including nonprofits, the Midland Community Healthcare Services, contracted physicians, mental health services, ER calls and Texas Tech University Health Science Center.